Physics 2 Final Exam

magnet

an object that produces a magnetic field which in turn exerts a magnetic force on objects within the field

do magnets occur naturally or artificially?

both

why cant the north and south poles of a magnet be separated

because if you break a magnet in half, it will form new poles along the break point

are magnets monopoles or dipoles

dipoles

ferromagnets

strong magnets made of iron, nickel or cobalt that are strongly attracted to magnetic fields, and are magnetized by being exposed to a magnet

What can make ferromagnets permanent magnets?

heating and then cooling or tapping the material

Curie temperature

the temperature needed to turn a Ferromagnets material into a magnet

Electromagnet

magnet produced by electric current; only produce a magnetic field while the current is flowing

magnetic field lines

-direction of field is tangent to field lines

-strength of field is proportional to the closeness of the lines

-field lines never cross

-continuous and form loops between the north and south poles of a magnet

Magnetic fields often cause particles to____. What is the force on the particles?

curve; the magnetic force is equal to the centripetal force

Hall Effect

occurs when a magnetic field is applied perpendicular to the current flow in a conductor, resulting in a voltage difference across the conductor.